@techreport{oai:repository.dl.itc.u-tokyo.ac.jp:00042427,
 author = {Kandori, Michihiro and Obara, Ichiro},
 month = {Dec},
 note = {application/pdf, 本文フィルはリンク先を参照のこと},
 title = {Efficiency in Repeated Games Revisited : The Role of Private Strategies},
 year = {2003}
}